Combined reamer and drill.



No. 645,760. Patented Mar. 20, I900. N. B. SPENCER;

COMBINED REAMER AND DRILL.

, (Applimtion filed Nov. 20. 1899.-

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NAPOLEON B. SPENCER, OF CINCINNATI, OHIO.

COMBINED REAM-ER AND DRILL.

SPECIFICATION forming part of Letters Patent No. 645,760, dated March20, 1900. Application filed Not/ember 20, 1899. Serial No. 737,610. (Nomodel.)

To CLZZ whom it may concern:

Be it known that I, NAPOLEON B. SPENCER, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in a CombinedReamerand Drill, of which the followingis a specification.

One of the objects of my invention is to provide an improved reamercarrying several cutters with means for simultaneously and uniformlyadjusting the same.

Another object of my invention is to provide a combined reamer andcutting-tool having the mechanism for simultaneously adj usting thecutters.

The features of my invention will be more fully set forth in thedescription of the accompanying drawings,forminga part of thisspecification, in which- 7 Figure 1 is an elevation of my invention inposition for use. Fig. 2 is a sectional elevation of Fig. 1. Fig. 3 isan end view with the bit removed. Fig. 4 is a plan view of the combinedreaming and boring cutter-blade. Fig. 5 is a plan view of the reamingcutterblade simply.

A represents the main spindle. It is provided with two different-sizedthreads. The smaller threaded end fits into abore G of the cutter-headB. This cutter-head is composed of a series of radial wings which areslotted or gained longitudinally to receive the cutters O.

D represents the slotted radial wings. I have shown four. There may beany number of such wings as desired. The base of the slot is taperingtoward the spindle, as shown in Fig. 2. The cutter-blades are likewisetapered and rest upon the base of this inclined groove.

E represents a center-bit which is of ordinary construction and has africtional engagement with the bore of the cutter-head, so as to hold itin position for drilling. This frictional engagement is usually made byslightly tapering the shank of the bit.

The cutters C are provided with notches a, I), thus forming offsets. Theofiset a allows the cutter to projectabove the adjustingthreads F. Theforward inward projection of the cutter O [its over the end of thecutterhead and is supported thereon in close proximity to thecenter-bit, as shown in Fig. 2.

The end of the cutter is beveled, as at c, to form a drill.

p d d represent longitudinal recesses formed in the face of the cuttersto receive the end ofthe set-screws e, which pass through the sides ofthe wings to hold the cutters from radial movement when they areadjusted forward. In order to adjust these cutters lon gitudinally, Iprovide the following means.

H represents a nut tapping on the threads F of the spindle.

I represents awasher loosely resting on said threads and abutting theends of the cutter and the face of the nut H. As the nut H is turnedforward it moves the cutters forward on their incline, which sets theirperiphery radially outward in proportion to the distance moved. Therecesses 61 allow the cutters to slip on the points of the set-screw e.

When the tool is used for a reamer simply,

the cutter-blades O are employed and are accordingly made to the planshown in Fig. 5.

It will thus be seen that my cutters are very firmly connected to thedrill-spindle and are securely held in position for work and that theseveral cutters may be simultaneously adjusted longitudinally withoutslacking the setscrews.

By the construction herein shown I provide a combined reamer anddrilling-tool having the ready means of adjustment heretofore described.

I do not Wish to limit myself to the thread engagement of the spindlewith the cutterhead, as any other means of making a firm connection withthese parts may be employed; but I consider the thread form the best.

Having described my invention, I claim- 1. In a combined reamer anddrill the combination of a cutter-head, a spindle attached thereto, aseries of radial wings, a slot in each wing having a tapered seat, acutter blade in each slot, a recessin the side face of each bladeparallel with the tapered seat, a holding device supported laterally byeach wing engaging in said blade recess, and means mounted on thespindle for adjusting the position of the cutter-blades, substantiallyas specified.

2. In combination with the double-threaded spindle A, provided with theadjustingthreads and a second series of threads with the cutter-head Bhaving the radial slotted wings and a bore having a threaded engagementwith the end of the spindle, a centerbit secured in said bore and thecutters C located in said Wings and having an inner projection adjacentto the cutter-bit and the adjusting-nut engaging with said spindle andcutters, substantially as described.

3. In combination with the cutter-head of a combined reamer and drill,having a series of slotted radial wings, taper-seats at the base of saidslots, a series of cutters provided with an inward projection forward ofthe bore of the cutter-head and a center-bit supported in the bore ofsaid cutter-head adjacent to the inner face of the cutter, substantiallyas herein specified,

4. In a combined reamer and drill the combination of a cutter-headhaving a screwthreaded central bore,a series of radial wings on thecutter-head each havinga radial slot, tapered seats in said slots,acutter-blade in each slot, a spindle having a reduced screwthreaded endengaging the said bore, the adjacent largerspindle portion being alsoscrewthreaded and having an adj usting-nnt thereon, the end of the saidlarger spindle portion forming a shoulder abutting the inner end of thecutter-head, a recess in the face of each cutter-blade parallel to thetaper of the seat, and means projected laterally from each radial wingengaging into said recesses, substantially as and for the purposesspecified.

5. In a combined reamer and drill, the combination of a cutter-headhaving a spindle, a series of radial slots in said cutter-head, eachhaving a tapered seat, a cutter-blade in each slot engaging the seat, arecess in the side of each blade parallel with the tapered seat, a screwpassing through the cutter-head into the side of said slot and engagingthe recess in the face of the blade seated in said slot, and meansmounted on the spindle for adjusting the position of the cutter-blades,substantially as described.

In testimony whereof I have hereunto set my hand.

NAPOLEON B. SPENCER.

lVitnesses:

OLIVER B. KAISER, EDWD. T. ALEXANDER.

